The fraunhofer Gesellschaft is the largest organization for applied research in Europe, having a staff of some 12,700, predominantly qualified scientists and engineers, with an annual research budget of over one billi...
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The fraunhofer Gesellschaft is the largest organization for applied research in Europe, having a staff of some 12,700, predominantly qualified scientists and engineers, with an annual research budget of over one billion euros. One of its current internal Market-oriented strategic preliminary research (MaVo) projects is FASPAS (Function Consolidated Adaptive Structures Combining Piezo and Software Technologies for Autonomous Systems) which aims to promote adaptive structure technology for commercial exploitation within the current main research fields of the participating FhIs, namely automotive and machinetools engineering. Under the project management of the fraunhofer-institute Structural Durability and System Reliability LBF the six fraunhoferinstitutes LBF, IWU, IKTS, ISC, AiS and IIS bring together their competences ranging from material sciences to system reliability, in order to clarify unanswered questions. The predominant goal is to develop and validate methods and tools to establish a closed, modular development chain for the design and realization of such active structures which shall be useful in its width and depth, i.e. for specific R&D achievements such as the actuator development (depth) as well as the complete system design and realization (width). FASPAS focuses on the development of systems and on the following scientific topics: 1.) on design and manufacturing technology for piezo components as integrable actuator/sensor semi-finished modules, 2.) on development and transducer module integration of miniaturized electronics for charge generating sensor systems, 3.) on the development of methods to analyze system reliability of active structures, 4.) on the development of autonomous software structures for flexible, low cost electronics hardware for bulk production and 5.) on the construction and validation of the complete, cost-effective development chain of function consolidated structures through application oriented demonstration structures.
This paper describes a systematic study of influences that have to be overcome for the application of interferometry in the high temperature range. A specially designed test facility including an optical arrangement i...
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Within the scope of the entire car industry, lightweight construction plays an increasingly dominating role in fulfilling requirements from a technological, environmental and economic point of view. This direction is ...
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The double blank hydroformingtechnology (DBH) without welding the blanks before forming, represents a good alternative formingtechnology to conventional deep drawing. In the following paper, the idea and the approac...
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Parallel structures are characterized by closed kinematics chains. Compared with conventional structures, which have serially arranged axes and are thus characterized by open kinematics chains, parallel structures hav...
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More complicated parts, higher requirements concerning shape and dimension accuracy, reduction of forming steps and utilization of new innovative materials represent important development trends in the today's aut...
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This paper describes an object-oriented model and a reuse-oriented methodology for the codesign of embedded computing systems. Our approach has been founded on a hierarchy of classes which describes all possible speci...
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This paper describes an object-oriented model and a reuse-oriented methodology for the codesign of embedded computing systems. Our approach has been founded on a hierarchy of classes which describes all possible speci...
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This paper describes an object-oriented model and a reuse-oriented methodology for the codesign of embedded computing systems. Our approach has been founded on a hierarchy of classes which describes all possible specifications of systems of a certain domain, the behavior of hard- and software-components, and the target-architectures. The content of this knowledge base (re-usable, formalized descriptions) is determined by the analysis of known systems. We present solutions for a specification methodology, the modeling of heterogeneous systems by task graphs, and the mapping process from specified requirements down to hard- or software components in a target architecture. The approach is illustrated by functions of the domain of robot controls.
This article will present characteristics that have great importance for the industrial use of metal foam structures. In detail, these are ■ Design criteria for detachable joint connections ■ Investigation of the th...
This article will present characteristics that have great importance for the industrial use of metal foam structures. In detail, these are ■ Design criteria for detachable joint connections ■ Investigation of the thermal behavior of sandwich composites
The well-tried method of fuzzy classification is extended to hierarchical class structures to allow combinations of data-based and rule-based class representations. An appropriate design method is suggested, the relat...
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The well-tried method of fuzzy classification is extended to hierarchical class structures to allow combinations of data-based and rule-based class representations. An appropriate design method is suggested, the relationships to system theory and fuzzy logic are shown and software features and application examples are described. The main application fields are diagnostics and supervision of technical processes. Model design is based on disjunctive aggregation of atomic classes, obtained by fuzzification of vectors in the feature space (learning samples). Membership functions of all fuzzy sets are described by an uniform multidimensional parametric concept. Rule-based components are an appropriate formal tool to represent multimodal class models and to integrate explicit expert knowledge. Class models can be seen as components of several types of systems (e.g. fuzzy controller) which transform measured data into discrete fuzzy sets. For this reason the initiation of further development of new fuzzy methods is expected. Two application cases with use of a class structure and its effect are studied.
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